61481601 has 12 divisors (see below), whose sum is σ = 88987860. Its totient is φ = 40904160.

The previous prime is 61481579. The next prime is 61481603. The reversal of 61481601 is 10618416.

It can be written as a sum of positive squares in 2 ways, for example, as 54464400 + 7017201 = 7380^2 + 2649^2 .

It is not a de Polignac number, because 61481601 - 2¹¹ = 61479553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61481603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2130 + ... + 11291.

It is an arithmetic number, because the mean of its divisors is an integer number (7415655).

Almost surely, 2^61481601 is an apocalyptic number.

It is an amenable number.

61481601 is a deficient number, since it is larger than the sum of its proper divisors (27506259).

61481601 is a wasteful number, since it uses less digits than its factorization.

61481601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13936 (or 13933 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 61481601 is about 7841.0204055340. The cubic root of 61481601 is about 394.6829715987.

It can be divided in two parts, 614 and 81601, that added together give a triangular number (82215 = T₄₀₅).

The spelling of 61481601 in words is "sixty-one million, four hundred eighty-one thousand, six hundred one".